CVE-2011-4963: nginx/Windows 1.3.x before 1.3.1 and 1.2.x before 1.2.1 allows remote attackers to bypass intended access r...

Security readout for executives and security teams

This issue affected old nginx builds running on Windows. A remote requester could bypass intended file access restrictions by using Windows filename quirks, potentially reading files that should have been blocked by configuration. Exposure is likely limited to legacy nginx deployments on Windows using affected 1.2.x or 1.3.x versions and relying on nginx access restrictions for sensitive files. Prioritize remediation if any Windows-based nginx deployment is still running these obsolete versions. The business risk is unauthorized file disclosure through a public web server, but evidence in the bundle does not support active exploitation. Mitigation focus: Upgrade nginx/Windows to 1.2.1, 1.3.1, or a later supported release.; Check nginx security advisories for any branch-specific upgrade guidance.; Retire unsupported nginx/Windows deployments where possible..

Prepared

Jun 27, 2026, 17:28 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.